docs: def put_contacts(self, uid, **kwargs):
          """
          Assign contacts to the specified list.
  
          :Example:
  
          client.lists.put_contacts(uid=1901010, contacts="1723812,1239912")
  
          :param int uid:      The unique id of the List. Required.
          :param str contacts: Contact ID(s), separated by comma. Required.
          """
          return self.update_subresource_instance(uid,
                                                  body=kwargs,
                                                  subresource=None,
                                                  slug="contacts")